Interleave is a Web-enabled business process automation application. It enables you to model your business process like purchasing, project management, and contract management and make it available online. It's meant to replace processes which currently rely on paper, email, or spreadsheets and it has a very good workflow engine. You can create invoices, export to RTF and PDF based on templates, export to MS Excel, interpret incoming email, and publish your data to the Web.

documentr is a Web-based tool for editing and presenting software documentation. It allows you to easily maintain documentation for multiple products and product branches. Edits can easily be copied between branches, with merge conflicts being handled gracefully. It uses Markdown as its markup language, along with some extensions, and has a role-based permission system.

dotCMS is a J2EE Web Content Management System (CMS) which includes a number of features which other Open Source CMS solutions do not. It is extremely easy for both users and developers to work with, and any number of new applications can be built within its framework. It features a multi-tenant/virtual hosting form builder, customizable/extensible workflow engine PHP, Groovy, Ruby, and Python scripting support, a full starter site using Responsive Design (Bootstrap framework), including a mobile version, custom content types, files as content, full-text document and metadata indexing, pessimistic content check-in/checkout, site-wide templating, object level permissions, clustering support, widgets and macros, a robust plugin architecture, an easy Windows installer, ElasticSearch for performance and horizontal scalability, an OSGI implementation, Spring 3 MVC Support, enterprise site searches, an accessibility checker in the WYSIWYG, RESTful APIs to access content and widgets, an integrated help system, and more.

Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting, and images. Pages are stored in a folder structure, like in an outliner, and can have attachments. Creating a new page is as easy as linking to a nonexistent page. All data is stored in plain text files with wiki formatting. Various plugins provide additional functionality, like a task list manager, an equation editor, a tray icon, and support for version control. Zim can be used to keep an archive of notes, take notes during meetings or lectures, organize task lists, draft blog entries and email, or do brainstorming.

TimeTrack is a program to track time in a modular, project-
oriented way. A single timer has the ability to help users track
time over a whole project through maintaining a list of triples
that consists of start time, end time, and a description field.
Timers can be arranged over several tabs, and information is
stored in XML files. It also has the ability to import single
timers from other files to merge timer data with other timer
data.

YaCy is a search engine that anyone can use to index the Internet (WWW and FTP) or to create a search portal for others (Internet or intranet). The scale of YaCy is limited only by the number of users. and can index billions of web pages. In P2P mode it is fully decentralized. All users of the search engine network are equal and it is not possible for anyone to censor the content of the distributed index.

mod_musicindex is an Apache module aimed at being
a C alternative to the Perl module Apache::MP3. It
allows nice displaying of directories containing
MP3, Ogg Vorbis, FLAC, or MP4/AAC files, including
sorting them on various fields,
streaming/downloading them, constructing
playlists, and searching. It also provides
features such as RSS and Podcast feeds, multiple
CSS support, and archive downloads.

The WWWOFFLE programs simplify World Wide Web
browsing from computers that use intermittent
(dialup) connections to the Internet. It is a
simple proxy server with special features for use
with dial-up Internet links. It makes it possible
to browse Web pages and read them without having
to remain connected. There are too many features
to mention, but they include privacy control,
cookie/advert blocking, efficient bandwidth usage
by specifying intervals between refreshes, options
to monitor pages regularly, recursive fetching,
HTML cleaning, highlighting of cached links,
indexes of cached pages, searching of cached
pages, and many more.

Bugzilla is the leading open-source/free software bug tracking system, with high-profile installations at mozilla.org, GNOME, Red Hat, and NASA, among others. It features a comprehensive set of fields, attachment management, inter-bug dependencies, email notification of changes, a powerful query interface, reporting, and Web, XML, email, and console interfaces. It can be managed entirely using a Web-based UI. The user UI is customizable using templates.

Calcurse is a text-based calendar and scheduling application. It helps keep track of events, appointments, and everyday tasks. A configurable notification system reminds the user of upcoming deadlines, and the curses based interface can be customized to suit user needs. All of the commands are documented within an online help system.